We've rounded up the top 10 most popular diet searches on Yahoo! for this January.

The HCG Diet is another controversial diet plan, most notably because medical professionals disagree on whether it's safe. HCG is a pregnancy hormone that's traditionally been used to treat fertility issues, but hasn't been FDA-approved to be used as a treatment for obesity. Since HCG injections are a part of the HCG Diet, this has caused some controversy within the medical sphere. In addition, the diet that accompanies the injections is extremely low-calorie. Our opinion? Skip this one!

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#10: The Dr. Oz Diet

The "Dr. Oz Diet" came in at No. 10 on the list of most-searched diet-related terms of the new year (so far). Dr. Oz, who co-authored the 2011 book, You: Losing Weight: The Owner's Manual to Simple and Healthy Weight Loss with Michael F. Roizen, MD, outlines a plan to help you lose two inches in two weeks by eating five small meals a day and focusing on protein and fiber.

The Cabbage Soup Diet has almost zero redeeming qualities: It's a fad diet that consists of eating cabbage soup for seven days, along with some fruits and vegetables. While you might lose weight quickly, it's all water weight and is likely to return as soon as you resume normal eating patterns.

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#7: The Dukan Diet

Otherwise known as the "real reason French women stay skinny," the Dukan Diet, a low-carb, protein-based plan, came in at No. 7 on the list. Although the Dukan Diet isn't new, it soared in popularity after it was rumored that Kate Middleton used it to get in wedding-photo shape for her royal nuptials. It's somewhat restrictive, but still features some pretty healthy foods, including kale, beetroot and salmon.

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#6: The 17-Day Diet

Dr. Michael Rafael Moreno, the creator of the 17-Day Diet, believes that it takes 21 days for your body to become accustomed to a new habit, but that at 17 days, the metabolism starts to slow down at any changes you make. So he devised a plan in which you change your diet every 17 days, by varying the amount of fruits, vegetables, carbs, and protein that you consume, as well as adding 17 minutes of exercise into your routine every day and starting your morning with Dr. Mike's Power Cookie.

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#5: The P.I.N.K. Method Diet

The P.I.N.K. Method Diet (which stands for power, intensity, nutrition, and kardio) was designed by Cynthia Pasquella, a nutritionist who wanted to design a program specifically targeted toward women's dietary needs. It's a four-part diet plan that includes a detoxifying stage, a fat-fighting stage, a seven-day "shred" stage in which you'll "shred" the last few pounds you have to lose, and lastly, a preservation stage, which focuses on long-term maintenance.

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#4: The Low-Carb Diet

The term "low-carb diet" could include any number of diet plans including the Dukan Diet, Atkins Diet, and the P.I.N.K. Method diet. Carbs often get a bad rap regarding the role they play in a healthy diet, but some carbs are good for you— just stick with healthy carbs, such as those found in fruit or whole grains.

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# 3: The Paleo Diet (Also Known as the "Caveman" Diet)

The Paleo Diet aims to take you back to our roots— way back. Consisting of raw, unprocessed, organic foods, the Paleo Diet includes plenty of fruits, vegetables, and meat but no dairy or processed foods. It's been simultaneously lauded as a new way to look at dieting and criticized for being too restrictive, so it may not be for everyone.

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#2: The HCG Diet

The HCG Diet is another controversial diet plan, most notably because medical professionals disagree on whether it's safe. HCG is a pregnancy hormone that's traditionally been used to treat fertility issues, but hasn't been FDA-approved to be used as a treatment for obesity. Since HCG injections are a part of the HCG Diet, this has caused some controversy within the medical sphere. In addition, the diet that accompanies the injections is extremely low-calorie. Our opinion? Skip this one!

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#1: The Atkins Diet

We've reached No.1 on the list! The always-talked about Atkins Diet made it to No. 1 on Yahoo's! list of top-searched diet terms so far this year. The Atkins Diet is controversial both in the U.S. and abroad for its claim that a low-carb, high-protein diet can help you lose weight quickly and in a healthy way, with proponents advocating that it can help you to lower your "bad" cholesterol as you lose weight, and skeptics arguing that it's not a healthy, long-term way to manage weight loss, but it continues to remain popular today.

We've rounded up the top 10 most popular diet searches on Yahoo! for this January.